Question

matching
match each item in column a with the items in column b. write the correct letters in the blanks.
(10 points each)
column a

1. nerves branching out from the spinal cord
2. chemicals released by neurons, which determine the rate at which other neurons fire
3. the brain and spinal cord
4. the gap that exists between individual nerve cells
5. long, thin cells of nerve tissue along which messages travel to and from the brain

column b
a. synapse
b. central nervous system
c. neurons
d. neurotransmitters
e. peripheral nervous system
multiple choice
choose the item that best completes each statement or answers each question. write the letter of that item in the blank to the left of the sentence. (10 points each)

1. the part of the nervous system that controls voluntary activities is the

a. central nervous system. c. somatic nervous system.
b. autonomic nervous system. d. peripheral nervous system.

1. which of the following is not a part of the peripheral nervous system?

a. the somatic nervous system c. nerves branching out from spinal cord
b. the autonomic nervous system d. the brain

1. the ______ insulates and protects the axon for some neurons.

a. axon terminal c. cell body
b. myelin sheath d. nucleus

1. also called motor neurons, the ______ send signals from the brain to the glands and muscles.

a. efferent neurons c. interneurons
b. afferent neurons d. neurotransmitters

1. which of the following is not a neurotransmitter?

a. interneuron c. norepinephrine
b. dopamine d. acetylcholine

Explanation:

• Question 6: The somatic nervous system controls voluntary activities. The central nervous system (brain and spinal cord) is involved in processing, the autonomic nervous system controls involuntary functions, and the peripheral nervous system is a broader category that includes the somatic and autonomic.
• Question 7: The brain is part of the central nervous system, not the peripheral nervous system. The somatic and autonomic nervous systems are parts of the peripheral nervous system, and nerves branching out from the spinal cord are also part of the peripheral nervous system.
• Question 8: The myelin sheath insulates and protects the axon for some neurons. The axon terminal is the end - part of the axon that releases neurotransmitters, the cell body contains the nucleus and other organelles, and the nucleus is within the cell body.
• Question 9: Efferent neurons (motor neurons) send signals from the brain to glands and muscles. Afferent neurons (sensory neurons) send signals to the brain, interneurons are in the central nervous system and connect neurons, and neurotransmitters are chemical messengers.
• Question 10: An interneuron is a type of neuron, not a neurotransmitter. Dopamine, norepinephrine, and acetylcholine are neurotransmitters.

Answer:

1. C. somatic nervous system
2. D. the brain
3. B. myelin sheath
4. A. efferent neurons
5. A. interneuron